Getting the last row of a table using jQuery?

I'm dynamically creating table rows. So each time I add a row, I need to get the ID of the last <tr> so that I can create a new <tr> with ID = "(the last row's ID) + 1". Is there any way to get the last row's ID using jQuery?

$('#yourtableid tr:last').attr('id');

var id = $('table tr:last').attr('id');

Old question, but here's a different way using JQuery traversal which is a bit quicker:

$("#TableId").find("tr").last();

An alternative method to ID your rows, if they are all sequential is just to get the number of rows + 1.

$("#TableId").find("tr").length + 1

2019

As of jQuery 3.4.0 :last is deprecated, use .last() instead, like this:

var id = $('#mytable tr').last().attr('id');

var tid=$('#tableid tr:last').attr('id');
alert(tid);